Train head total height = 81.50mmlength = 117.2mmwide = 62.0mmusing Solidworks 2018 CAD to draw.given file is Solidworks, STEP and STL.the STL and STEP file individual already included with mounting guide, so no need to worry to do 3D printing using STL file.the mounting clearance is 0.2mmattached also included with solid body, so you can modified if wanted.